Table 1. Female sterility associated with yem mutations.
| Genotype of females | No. of eggs | No. of larvae | Hatch rate (%) |
| w; yemEY23024/Df(3R)3450 | 885 | 758 | 85.6 |
| w; yem1/Df(3R)3450 | 984 | 0 | 0 |
| w; yem2/Df(3R)3450 | 948 | 0 | 0 |
| w; yem1/yem2 | 1109 | 0 | 0 |
| w yem-flagHPF1/w; yem1/Df(3R)3450 | 1444 | 8 | 0.5 |
| w yem-flagHPF1/w; yem2/Df(3R)3450 | 1337 | 0 | 0 |
| w yem-flagHPF1/w yem-flagHPF1; yem1/Df(3R)3450 | 513 | 362 | 70.5 |
| w yem-flagHPF1/w Yem-flagHPF1; yem2/Df(3R)3450 | 577 | 256 | 44.4 |
| w; yem-flagHPF16/+; yem2/Df(3R)3450 | 638 | 507 | 79.5 |
| w; yem-flagHPF16/yem-flagHPF16; yem2/Df(3R)3450 | 667 | 660 | 98.9 |
All yem mutant alleles are described in Figure 1. Df(3R)3450 is a large deficiency covering the yem locus. yem-flagHPF1 and yem-flagHPF16 are two independent insertions of the same transgene.